For metallurgical purposes
is used material with Silicon Carbide SiC content min.
Silicon Crabide SiC 98% is further crushed and formed on sorting lines
and classified into different types of abrasive grains. All production
process is permanently checked by internal laboratory which ensures
conforming to technological method and following creation of quality
Silicon Carbide black is mainly used for production of
abrasive tools and instruments. Among further possibilities of
usage belongs blasting by dry and wet method, production of refractory
blocks, bricks, refractory cements and compacting mixtures.
electrotechnical industry for production of insulating materials and
lighting arresters. Wonderfully is asserted as addition to
laminated and frame saws at cutting of stone, than as filling
agent to epoxy resins for increasing of rsistance against wear.
SILICON CARBIDE AND METALLURGY
ADVANTAGES OF USE OF SIC BRIQUETTES
Silicon Carbide is used in foundries in many forms and
it´s usage is known for many years ago. There have been
established using of Silicon Carbide in United States of Amerika
before the Second World War already. The Europe begun to use
it on a large scale in 80 years.
Silicon Carbide for usage in electric furnaces is supplied
mainly with content of 90% SiC in various granulations. Silicon Carbide
is delivered in form of briquettes for usage in cupola furnaces.
Use of Silicon Carbide by ferro-silicon substitution in the foundry
industry has the economic justification - significantly enhances the
quality of cast iron. According to stoichiometric ratio the Silicon
Carbide decomposes in the furnace into 70% of free silicon Si and
30% of free carbon C. These ingredients are then dissolved
in alloy. The fundamental difference between the use of silicon
carbide and ferro-silicon is the fact that under the laws of
thermodynamics, the rising temperature increases the ability of
deoxidation of carbon. By contrast, deoxidation ability
of ferrosilicon decreases with increasing temperature. Increased
ability of deoxidation using by carbon has a significant impact on
the quality of the cast iron and allows increasing the share of scrap.